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Revision 1.100 - (show annotations) (download)
Sun Feb 10 07:53:31 2013 UTC (16 months, 4 weeks ago) by vapier
Branch: MAIN
Changes since 1.99: +9 -2 lines
if KERNEL_DIR is pointing to the object output, figure out the source dir and setup KBUILD_OUTPUT automatically #454294 by Ɓukasz Stelmach

1 # Copyright 1999-2013 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.99 2013/02/10 06:20:10 vapier Exp $
4
5 # @ECLASS: linux-info.eclass
6 # @MAINTAINER:
7 # kernel-misc@gentoo.org
8 # @AUTHOR:
9 # Original author: John Mylchreest <johnm@gentoo.org>
10 # @BLURB: eclass used for accessing kernel related information
11 # @DESCRIPTION:
12 # This eclass is used as a central eclass for accessing kernel
13 # related information for source or binary already installed.
14 # It is vital for linux-mod.eclass to function correctly, and is split
15 # out so that any ebuild behaviour "templates" are abstracted out
16 # using additional eclasses.
17 #
18 # "kernel config" in this file means:
19 # The .config of the currently installed sources is used as the first
20 # preference, with a fall-back to bundled config (/proc/config.gz) if available.
21 #
22 # Before using any of the config-handling functions in this eclass, you must
23 # ensure that one of the following functions has been called (in order of
24 # preference), otherwise you will get bugs like #364041):
25 # linux-info_pkg_setup
26 # linux-info_get_any_version
27 # get_version
28 # get_running_version
29
30 # A Couple of env vars are available to effect usage of this eclass
31 # These are as follows:
32
33 # @ECLASS-VARIABLE: KERNEL_DIR
34 # @DESCRIPTION:
35 # A string containing the directory of the target kernel sources. The default value is
36 # "/usr/src/linux"
37
38 # @ECLASS-VARIABLE: CONFIG_CHECK
39 # @DESCRIPTION:
40 # A string containing a list of .config options to check for before
41 # proceeding with the install.
42 #
43 # e.g.: CONFIG_CHECK="MTRR"
44 #
45 # You can also check that an option doesn't exist by
46 # prepending it with an exclamation mark (!).
47 #
48 # e.g.: CONFIG_CHECK="!MTRR"
49 #
50 # To simply warn about a missing option, prepend a '~'.
51 # It may be combined with '!'.
52 #
53 # In general, most checks should be non-fatal. The only time fatal checks should
54 # be used is for building kernel modules or cases that a compile will fail
55 # without the option.
56 #
57 # This is to allow usage of binary kernels, and minimal systems without kernel
58 # sources.
59
60 # @ECLASS-VARIABLE: ERROR_<CFG>
61 # @DESCRIPTION:
62 # A string containing the error message to display when the check against CONFIG_CHECK
63 # fails. <CFG> should reference the appropriate option used in CONFIG_CHECK.
64 #
65 # e.g.: ERROR_MTRR="MTRR exists in the .config but shouldn't!!"
66
67 # @ECLASS-VARIABLE: KBUILD_OUTPUT
68 # @DESCRIPTION:
69 # A string passed on commandline, or set from the kernel makefile. It contains the directory
70 # which is to be used as the kernel object directory.
71
72 # There are also a couple of variables which are set by this, and shouldn't be
73 # set by hand. These are as follows:
74
75 # @ECLASS-VARIABLE: KV_FULL
76 # @DESCRIPTION:
77 # A read-only variable. It's a string containing the full kernel version. ie: 2.6.9-gentoo-johnm-r1
78
79 # @ECLASS-VARIABLE: KV_MAJOR
80 # @DESCRIPTION:
81 # A read-only variable. It's an integer containing the kernel major version. ie: 2
82
83 # @ECLASS-VARIABLE: KV_MINOR
84 # @DESCRIPTION:
85 # A read-only variable. It's an integer containing the kernel minor version. ie: 6
86
87 # @ECLASS-VARIABLE: KV_PATCH
88 # @DESCRIPTION:
89 # A read-only variable. It's an integer containing the kernel patch version. ie: 9
90
91 # @ECLASS-VARIABLE: KV_EXTRA
92 # @DESCRIPTION:
93 # A read-only variable. It's a string containing the kernel EXTRAVERSION. ie: -gentoo
94
95 # @ECLASS-VARIABLE: KV_LOCAL
96 # @DESCRIPTION:
97 # A read-only variable. It's a string containing the kernel LOCALVERSION concatenation. ie: -johnm
98
99 # @ECLASS-VARIABLE: KV_DIR
100 # @DESCRIPTION:
101 # A read-only variable. It's a string containing the kernel source directory, will be null if
102 # KERNEL_DIR is invalid.
103
104 # @ECLASS-VARIABLE: KV_OUT_DIR
105 # @DESCRIPTION:
106 # A read-only variable. It's a string containing the kernel object directory, will be KV_DIR unless
107 # KBUILD_OUTPUT is used. This should be used for referencing .config.
108
109 # And to ensure all the weirdness with crosscompile
110 inherit toolchain-funcs versionator
111
112 EXPORT_FUNCTIONS pkg_setup
113
114 # Overwritable environment Var's
115 # ---------------------------------------
116 KERNEL_DIR="${KERNEL_DIR:-${ROOT}usr/src/linux}"
117
118
119 # Bug fixes
120 # fix to bug #75034
121 case ${ARCH} in
122 ppc) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
123 ppc64) BUILD_FIXES="${BUILD_FIXES} TOUT=${T}/.tmp_gas_check";;
124 esac
125
126 # @FUNCTION: set_arch_to_kernel
127 # @DESCRIPTION:
128 # Set the env ARCH to match what the kernel expects.
129 set_arch_to_kernel() { export ARCH=$(tc-arch-kernel); }
130 # @FUNCTION: set_arch_to_portage
131 # @DESCRIPTION:
132 # Set the env ARCH to match what portage expects.
133 set_arch_to_portage() { export ARCH=$(tc-arch); }
134
135 # qeinfo "Message"
136 # -------------------
137 # qeinfo is a quiet einfo call when EBUILD_PHASE
138 # should not have visible output.
139 qout() {
140 local outputmsg type
141 type=${1}
142 shift
143 outputmsg="${@}"
144 case "${EBUILD_PHASE}" in
145 depend) unset outputmsg;;
146 clean) unset outputmsg;;
147 preinst) unset outputmsg;;
148 esac
149 [ -n "${outputmsg}" ] && ${type} "${outputmsg}"
150 }
151
152 qeinfo() { qout einfo "${@}" ; }
153 qewarn() { qout ewarn "${@}" ; }
154 qeerror() { qout eerror "${@}" ; }
155
156 # File Functions
157 # ---------------------------------------
158
159 # @FUNCTION: getfilevar
160 # @USAGE: variable configfile
161 # @RETURN: the value of the variable
162 # @DESCRIPTION:
163 # It detects the value of the variable defined in the file configfile. This is
164 # done by including the configfile, and printing the variable with Make.
165 # It WILL break if your makefile has missing dependencies!
166 getfilevar() {
167 local ERROR basefname basedname myARCH="${ARCH}"
168 ERROR=0
169
170 [ -z "${1}" ] && ERROR=1
171 [ ! -f "${2}" ] && ERROR=1
172
173 if [ "${ERROR}" = 1 ]
174 then
175 echo -e "\n"
176 eerror "getfilevar requires 2 variables, with the second a valid file."
177 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
178 else
179 basefname="$(basename ${2})"
180 basedname="$(dirname ${2})"
181 unset ARCH
182
183 # We use nonfatal because we want the caller to take care of things #373151
184 [[ ${EAPI:-0} == [0123] ]] && nonfatal() { "$@"; }
185 echo -e "e:\\n\\t@echo \$(${1})\\ninclude ${basefname}" | \
186 nonfatal emake -C "${basedname}" M="${S}" ${BUILD_FIXES} -s -f - 2>/dev/null
187
188 ARCH=${myARCH}
189 fi
190 }
191
192 # @FUNCTION: getfilevar_noexec
193 # @USAGE: variable configfile
194 # @RETURN: the value of the variable
195 # @DESCRIPTION:
196 # It detects the value of the variable defined in the file configfile.
197 # This is done with sed matching an expression only. If the variable is defined,
198 # you will run into problems. See getfilevar for those cases.
199 getfilevar_noexec() {
200 local ERROR basefname basedname mycat myARCH="${ARCH}"
201 ERROR=0
202 mycat='cat'
203
204 [ -z "${1}" ] && ERROR=1
205 [ ! -f "${2}" ] && ERROR=1
206 [ "${2%.gz}" != "${2}" ] && mycat='zcat'
207
208 if [ "${ERROR}" = 1 ]
209 then
210 echo -e "\n"
211 eerror "getfilevar_noexec requires 2 variables, with the second a valid file."
212 eerror " getfilevar_noexec <VARIABLE> <CONFIGFILE>"
213 else
214 ${mycat} "${2}" | \
215 sed -n \
216 -e "/^[[:space:]]*${1}[[:space:]]*:\\?=[[:space:]]*\(.*\)\$/{
217 s,^[^=]*[[:space:]]*=[[:space:]]*,,g ;
218 s,[[:space:]]*\$,,g ;
219 p
220 }"
221 fi
222 }
223
224 # @ECLASS-VARIABLE: _LINUX_CONFIG_EXISTS_DONE
225 # @INTERNAL
226 # @DESCRIPTION:
227 # This is only set if one of the linux_config_*exists functions has been called.
228 # We use it for a QA warning that the check for a config has not been performed,
229 # as linux_chkconfig* in non-legacy mode WILL return an undefined value if no
230 # config is available at all.
231 _LINUX_CONFIG_EXISTS_DONE=
232
233 linux_config_qa_check() {
234 local f="$1"
235 if [ -z "${_LINUX_CONFIG_EXISTS_DONE}" ]; then
236 ewarn "QA: You called $f before any linux_config_exists!"
237 ewarn "QA: The return value of $f will NOT guaranteed later!"
238 fi
239 }
240
241 # @FUNCTION: linux_config_src_exists
242 # @RETURN: true or false
243 # @DESCRIPTION:
244 # It returns true if .config exists in a build directory otherwise false
245 linux_config_src_exists() {
246 export _LINUX_CONFIG_EXISTS_DONE=1
247 [[ -n ${KV_OUT_DIR} && -s ${KV_OUT_DIR}/.config ]]
248 }
249
250 # @FUNCTION: linux_config_bin_exists
251 # @RETURN: true or false
252 # @DESCRIPTION:
253 # It returns true if .config exists in /proc, otherwise false
254 linux_config_bin_exists() {
255 export _LINUX_CONFIG_EXISTS_DONE=1
256 [[ -s /proc/config.gz ]]
257 }
258
259 # @FUNCTION: linux_config_exists
260 # @RETURN: true or false
261 # @DESCRIPTION:
262 # It returns true if .config exists otherwise false
263 #
264 # This function MUST be checked before using any of the linux_chkconfig_*
265 # functions.
266 linux_config_exists() {
267 linux_config_src_exists || linux_config_bin_exists
268 }
269
270 # @FUNCTION: linux_config_path
271 # @DESCRIPTION:
272 # Echo the name of the config file to use. If none are found,
273 # then return false.
274 linux_config_path() {
275 if linux_config_src_exists; then
276 echo "${KV_OUT_DIR}/.config"
277 elif linux_config_bin_exists; then
278 echo "/proc/config.gz"
279 else
280 return 1
281 fi
282 }
283
284 # @FUNCTION: require_configured_kernel
285 # @DESCRIPTION:
286 # This function verifies that the current kernel is configured (it checks against the existence of .config)
287 # otherwise it dies.
288 require_configured_kernel() {
289 if ! linux_config_src_exists; then
290 qeerror "Could not find a usable .config in the kernel source directory."
291 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
292 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
293 qeerror "it points to the necessary object directory so that it might find .config."
294 die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
295 fi
296 }
297
298 # @FUNCTION: linux_chkconfig_present
299 # @USAGE: option
300 # @RETURN: true or false
301 # @DESCRIPTION:
302 # It checks that CONFIG_<option>=y or CONFIG_<option>=m is present in the current kernel .config
303 # If linux_config_exists returns false, the results of this are UNDEFINED. You
304 # MUST call linux_config_exists first.
305 linux_chkconfig_present() {
306 linux_config_qa_check linux_chkconfig_present
307 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == [my] ]]
308 }
309
310 # @FUNCTION: linux_chkconfig_module
311 # @USAGE: option
312 # @RETURN: true or false
313 # @DESCRIPTION:
314 # It checks that CONFIG_<option>=m is present in the current kernel .config
315 # If linux_config_exists returns false, the results of this are UNDEFINED. You
316 # MUST call linux_config_exists first.
317 linux_chkconfig_module() {
318 linux_config_qa_check linux_chkconfig_module
319 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == m ]]
320 }
321
322 # @FUNCTION: linux_chkconfig_builtin
323 # @USAGE: option
324 # @RETURN: true or false
325 # @DESCRIPTION:
326 # It checks that CONFIG_<option>=y is present in the current kernel .config
327 # If linux_config_exists returns false, the results of this are UNDEFINED. You
328 # MUST call linux_config_exists first.
329 linux_chkconfig_builtin() {
330 linux_config_qa_check linux_chkconfig_builtin
331 [[ $(getfilevar_noexec "CONFIG_$1" "$(linux_config_path)") == y ]]
332 }
333
334 # @FUNCTION: linux_chkconfig_string
335 # @USAGE: option
336 # @RETURN: CONFIG_<option>
337 # @DESCRIPTION:
338 # It prints the CONFIG_<option> value of the current kernel .config (it requires a configured kernel).
339 # If linux_config_exists returns false, the results of this are UNDEFINED. You
340 # MUST call linux_config_exists first.
341 linux_chkconfig_string() {
342 linux_config_qa_check linux_chkconfig_string
343 getfilevar_noexec "CONFIG_$1" "$(linux_config_path)"
344 }
345
346 # Versioning Functions
347 # ---------------------------------------
348
349 # @FUNCTION: kernel_is
350 # @USAGE: [-lt -gt -le -ge -eq] major_number [minor_number patch_number]
351 # @RETURN: true or false
352 # @DESCRIPTION:
353 # It returns true when the current kernel version satisfies the comparison against the passed version.
354 # -eq is the default comparison.
355 #
356 # @CODE
357 # For Example where KV = 2.6.9
358 # kernel_is 2 4 returns false
359 # kernel_is 2 returns true
360 # kernel_is 2 6 returns true
361 # kernel_is 2 6 8 returns false
362 # kernel_is 2 6 9 returns true
363 # @CODE
364
365 # Note: duplicated in kernel-2.eclass
366 kernel_is() {
367 # if we haven't determined the version yet, we need to.
368 linux-info_get_any_version
369
370 # Now we can continue
371 local operator test value
372
373 case ${1#-} in
374 lt) operator="-lt"; shift;;
375 gt) operator="-gt"; shift;;
376 le) operator="-le"; shift;;
377 ge) operator="-ge"; shift;;
378 eq) operator="-eq"; shift;;
379 *) operator="-eq";;
380 esac
381 [[ $# -gt 3 ]] && die "Error in kernel-2_kernel_is(): too many parameters"
382
383 : $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
384 : $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
385 [ ${test} ${operator} ${value} ]
386 }
387
388 get_localversion() {
389 local lv_list i x
390
391 # ignore files with ~ in it.
392 for i in $(ls ${1}/localversion* 2>/dev/null); do
393 [[ -n ${i//*~*} ]] && lv_list="${lv_list} ${i}"
394 done
395
396 for i in ${lv_list}; do
397 x="${x}$(<${i})"
398 done
399 x=${x/ /}
400 echo ${x}
401 }
402
403 # Check if the Makefile is valid for direct parsing.
404 # Check status results:
405 # - PASS, use 'getfilevar' to extract values
406 # - FAIL, use 'getfilevar_noexec' to extract values
407 # The check may fail if:
408 # - make is not present
409 # - corruption exists in the kernel makefile
410 get_makefile_extract_function() {
411 local a='' b='' mkfunc='getfilevar'
412 a="$(getfilevar VERSION ${KERNEL_MAKEFILE})"
413 b="$(getfilevar_noexec VERSION ${KERNEL_MAKEFILE})"
414 [[ "${a}" != "${b}" ]] && mkfunc='getfilevar_noexec'
415 echo "${mkfunc}"
416 }
417
418 # internal variable, so we know to only print the warning once
419 get_version_warning_done=
420
421 # @FUNCTION: get_version
422 # @DESCRIPTION:
423 # It gets the version of the kernel inside KERNEL_DIR and populates the KV_FULL variable
424 # (if KV_FULL is already set it does nothing).
425 #
426 # The kernel version variables (KV_MAJOR, KV_MINOR, KV_PATCH, KV_EXTRA and KV_LOCAL) are also set.
427 #
428 # The KV_DIR is set using the KERNEL_DIR env var, the KV_DIR_OUT is set using a valid
429 # KBUILD_OUTPUT (in a decreasing priority list, we look for the env var, makefile var or the
430 # symlink /lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build).
431 get_version() {
432 local kbuild_output mkfunc tmplocal
433
434 # no need to execute this twice assuming KV_FULL is populated.
435 # we can force by unsetting KV_FULL
436 [ -n "${KV_FULL}" ] && return 0
437
438 # if we dont know KV_FULL, then we need too.
439 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
440 unset KV_DIR
441
442 # KV_DIR will contain the full path to the sources directory we should use
443 [ -z "${get_version_warning_done}" ] && \
444 qeinfo "Determining the location of the kernel source code"
445 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
446 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
447
448 if [ -z "${KV_DIR}" ]
449 then
450 if [ -z "${get_version_warning_done}" ]; then
451 get_version_warning_done=1
452 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
453 #qeinfo "This package requires Linux sources."
454 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
455 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
456 qeinfo "(or the kernel you wish to build against)."
457 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
458 else
459 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
460 fi
461 fi
462 return 1
463 fi
464
465 # See if the kernel dir is actually an output dir. #454294
466 if [ -z "${KBUILD_OUTPUT}" -a -L "${KERNEL_DIR}/source" ]; then
467 KBUILD_OUTPUT=${KERNEL_DIR}
468 KERNEL_DIR=$(readlink -f "${KERNEL_DIR}/source")
469 KV_DIR=${KERNEL_DIR}
470 fi
471
472 if [ -z "${get_version_warning_done}" ]; then
473 qeinfo "Found kernel source directory:"
474 qeinfo " ${KV_DIR}"
475 fi
476
477 if [ ! -s "${KV_DIR}/Makefile" ]
478 then
479 if [ -z "${get_version_warning_done}" ]; then
480 get_version_warning_done=1
481 qeerror "Could not find a Makefile in the kernel source directory."
482 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
483 fi
484 return 1
485 fi
486
487 # OK so now we know our sources directory, but they might be using
488 # KBUILD_OUTPUT, and we need this for .config and localversions-*
489 # so we better find it eh?
490 # do we pass KBUILD_OUTPUT on the CLI?
491 local OUTPUT_DIR=${KBUILD_OUTPUT}
492
493 # keep track of it
494 KERNEL_MAKEFILE="${KV_DIR}/Makefile"
495
496 # Decide the function used to extract makefile variables.
497 mkfunc="$(get_makefile_extract_function "${KERNEL_MAKEFILE}")"
498
499 # And if we didn't pass it, we can take a nosey in the Makefile
500 kbuild_output="$(${mkfunc} KBUILD_OUTPUT ${KERNEL_MAKEFILE})"
501 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
502
503 # And contrary to existing functions I feel we shouldn't trust the
504 # directory name to find version information as this seems insane.
505 # so we parse ${KERNEL_MAKEFILE}
506 KV_MAJOR="$(${mkfunc} VERSION ${KERNEL_MAKEFILE})"
507 KV_MINOR="$(${mkfunc} PATCHLEVEL ${KERNEL_MAKEFILE})"
508 KV_PATCH="$(${mkfunc} SUBLEVEL ${KERNEL_MAKEFILE})"
509 KV_EXTRA="$(${mkfunc} EXTRAVERSION ${KERNEL_MAKEFILE})"
510
511 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
512 then
513 if [ -z "${get_version_warning_done}" ]; then
514 get_version_warning_done=1
515 qeerror "Could not detect kernel version."
516 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources."
517 fi
518 return 1
519 fi
520
521 # and in newer versions we can also pull LOCALVERSION if it is set.
522 # but before we do this, we need to find if we use a different object directory.
523 # This *WILL* break if the user is using localversions, but we assume it was
524 # caught before this if they are.
525 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}/build}"
526
527 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
528 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
529 if [ -n "${KV_OUT_DIR}" ];
530 then
531 qeinfo "Found kernel object directory:"
532 qeinfo " ${KV_OUT_DIR}"
533 fi
534 # and if we STILL have not got it, then we better just set it to KV_DIR
535 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
536
537 # Grab the kernel release from the output directory.
538 # TODO: we MUST detect kernel.release being out of date, and 'return 1' from
539 # this function.
540 if [ -s "${KV_OUT_DIR}"/include/config/kernel.release ]; then
541 KV_LOCAL=$(<"${KV_OUT_DIR}"/include/config/kernel.release)
542 elif [ -s "${KV_OUT_DIR}"/.kernelrelease ]; then
543 KV_LOCAL=$(<"${KV_OUT_DIR}"/.kernelrelease)
544 else
545 KV_LOCAL=
546 fi
547
548 # KV_LOCAL currently contains the full release; discard the first bits.
549 tmplocal=${KV_LOCAL#${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}}
550
551 # If the updated local version was not changed, the tree is not prepared.
552 # Clear out KV_LOCAL in that case.
553 # TODO: this does not detect a change in the localversion part between
554 # kernel.release and the value that would be generated.
555 if [ "$KV_LOCAL" = "$tmplocal" ]; then
556 KV_LOCAL=
557 else
558 KV_LOCAL=$tmplocal
559 fi
560
561 # And we should set KV_FULL to the full expanded version
562 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
563
564 qeinfo "Found sources for kernel version:"
565 qeinfo " ${KV_FULL}"
566
567 return 0
568 }
569
570 # @FUNCTION: get_running_version
571 # @DESCRIPTION:
572 # It gets the version of the current running kernel and the result is the same as get_version() if the
573 # function can find the sources.
574 get_running_version() {
575 KV_FULL=$(uname -r)
576
577 if [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile && -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
578 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
579 KBUILD_OUTPUT=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
580 unset KV_FULL
581 get_version
582 return $?
583 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/source/Makefile ]]; then
584 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/source)
585 unset KV_FULL
586 get_version
587 return $?
588 elif [[ -f ${ROOT}/lib/modules/${KV_FULL}/build/Makefile ]]; then
589 KERNEL_DIR=$(readlink -f ${ROOT}/lib/modules/${KV_FULL}/build)
590 unset KV_FULL
591 get_version
592 return $?
593 else
594 # This handles a variety of weird kernel versions. Make sure to update
595 # tests/linux-info:get_running_version.sh if you want to change this.
596 local kv_full=${KV_FULL//[-+_]*}
597 KV_MAJOR=$(get_version_component_range 1 ${kv_full})
598 KV_MINOR=$(get_version_component_range 2 ${kv_full})
599 KV_PATCH=$(get_version_component_range 3 ${kv_full})
600 KV_EXTRA="${KV_FULL#${KV_MAJOR}.${KV_MINOR}${KV_PATCH:+.${KV_PATCH}}}"
601 : ${KV_PATCH:=0}
602 fi
603 return 0
604 }
605
606 # This next function is named with the eclass prefix to avoid conflicts with
607 # some old versionator-like eclass functions.
608
609 # @FUNCTION: linux-info_get_any_version
610 # @DESCRIPTION:
611 # This attempts to find the version of the sources, and otherwise falls back to
612 # the version of the running kernel.
613 linux-info_get_any_version() {
614 get_version
615 if [[ $? -ne 0 ]]; then
616 ewarn "Unable to calculate Linux Kernel version for build, attempting to use running version"
617 get_running_version
618 fi
619 }
620
621
622 # ebuild check functions
623 # ---------------------------------------
624
625 # @FUNCTION: check_kernel_built
626 # @DESCRIPTION:
627 # This function verifies that the current kernel sources have been already prepared otherwise it dies.
628 check_kernel_built() {
629 # if we haven't determined the version yet, we need to
630 require_configured_kernel
631 get_version
632
633 local versionh_path
634 if kernel_is -ge 3 7; then
635 versionh_path="include/generated/uapi/linux/version.h"
636 else
637 versionh_path="include/linux/version.h"
638 fi
639
640 if [ ! -f "${KV_OUT_DIR}/${versionh_path}" ]
641 then
642 eerror "These sources have not yet been prepared."
643 eerror "We cannot build against an unprepared tree."
644 eerror "To resolve this, please type the following:"
645 eerror
646 eerror "# cd ${KV_DIR}"
647 eerror "# make oldconfig"
648 eerror "# make modules_prepare"
649 eerror
650 eerror "Then please try merging this module again."
651 die "Kernel sources need compiling first"
652 fi
653 }
654
655 # @FUNCTION: check_modules_supported
656 # @DESCRIPTION:
657 # This function verifies that the current kernel support modules (it checks CONFIG_MODULES=y) otherwise it dies.
658 check_modules_supported() {
659 # if we haven't determined the version yet, we need too.
660 require_configured_kernel
661 get_version
662
663 if ! linux_chkconfig_builtin "MODULES"; then
664 eerror "These sources do not support loading external modules."
665 eerror "to be able to use this module please enable \"Loadable modules support\""
666 eerror "in your kernel, recompile and then try merging this module again."
667 die "No support for external modules in ${KV_FULL} config"
668 fi
669 }
670
671 # @FUNCTION: check_extra_config
672 # @DESCRIPTION:
673 # It checks the kernel config options specified by CONFIG_CHECK. It dies only when a required config option (i.e.
674 # the prefix ~ is not used) doesn't satisfy the directive.
675 check_extra_config() {
676 local config negate die error reworkmodulenames
677 local soft_errors_count=0 hard_errors_count=0 config_required=0
678 # store the value of the QA check, because otherwise we won't catch usages
679 # after if check_extra_config is called AND other direct calls are done
680 # later.
681 local old_LINUX_CONFIG_EXISTS_DONE="${_LINUX_CONFIG_EXISTS_DONE}"
682
683 # if we haven't determined the version yet, we need to
684 linux-info_get_any_version
685
686 # Determine if we really need a .config. The only time when we don't need
687 # one is when all of the CONFIG_CHECK options are prefixed with "~".
688 for config in ${CONFIG_CHECK}; do
689 if [[ "${config:0:1}" != "~" ]]; then
690 config_required=1
691 break
692 fi
693 done
694
695 if [[ ${config_required} == 0 ]]; then
696 # In the case where we don't require a .config, we can now bail out
697 # if the user has no .config as there is nothing to do. Otherwise
698 # code later will cause a failure due to missing .config.
699 if ! linux_config_exists; then
700 ewarn "Unable to check for the following kernel config options due"
701 ewarn "to absence of any configured kernel sources or compiled"
702 ewarn "config:"
703 for config in ${CONFIG_CHECK}; do
704 local_error="ERROR_${config#\~}"
705 msg="${!local_error}"
706 if [[ "x${msg}" == "x" ]]; then
707 local_error="WARNING_${config#\~}"
708 msg="${!local_error}"
709 fi
710 ewarn " - ${config#\~}${msg:+ - }${msg}"
711 done
712 ewarn "You're on your own to make sure they are set if needed."
713 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
714 return 0
715 fi
716 else
717 require_configured_kernel
718 fi
719
720 einfo "Checking for suitable kernel configuration options..."
721
722 for config in ${CONFIG_CHECK}
723 do
724 # if we specify any fatal, ensure we honor them
725 die=1
726 error=0
727 negate=0
728 reworkmodulenames=0
729
730 if [[ ${config:0:1} == "~" ]]; then
731 die=0
732 config=${config:1}
733 elif [[ ${config:0:1} == "@" ]]; then
734 die=0
735 reworkmodulenames=1
736 config=${config:1}
737 fi
738 if [[ ${config:0:1} == "!" ]]; then
739 negate=1
740 config=${config:1}
741 fi
742
743 if [[ ${negate} == 1 ]]; then
744 linux_chkconfig_present ${config} && error=2
745 elif [[ ${reworkmodulenames} == 1 ]]; then
746 local temp_config="${config//*:}" i n
747 config="${config//:*}"
748 if linux_chkconfig_present ${config}; then
749 for i in ${MODULE_NAMES}; do
750 n="${i//${temp_config}}"
751 [[ -z ${n//\(*} ]] && \
752 MODULE_IGNORE="${MODULE_IGNORE} ${temp_config}"
753 done
754 error=2
755 fi
756 else
757 linux_chkconfig_present ${config} || error=1
758 fi
759
760 if [[ ${error} > 0 ]]; then
761 local report_func="eerror" local_error
762 local_error="ERROR_${config}"
763 local_error="${!local_error}"
764
765 if [[ -z "${local_error}" ]]; then
766 # using old, deprecated format.
767 local_error="${config}_ERROR"
768 local_error="${!local_error}"
769 fi
770 if [[ ${die} == 0 && -z "${local_error}" ]]; then
771 #soft errors can be warnings
772 local_error="WARNING_${config}"
773 local_error="${!local_error}"
774 if [[ -n "${local_error}" ]] ; then
775 report_func="ewarn"
776 fi
777 fi
778
779 if [[ -z "${local_error}" ]]; then
780 [[ ${error} == 1 ]] \
781 && local_error="is not set when it should be." \
782 || local_error="should not be set. But it is."
783 local_error="CONFIG_${config}:\t ${local_error}"
784 fi
785 if [[ ${die} == 0 ]]; then
786 ${report_func} " ${local_error}"
787 soft_errors_count=$[soft_errors_count + 1]
788 else
789 ${report_func} " ${local_error}"
790 hard_errors_count=$[hard_errors_count + 1]
791 fi
792 fi
793 done
794
795 if [[ ${hard_errors_count} > 0 ]]; then
796 eerror "Please check to make sure these options are set correctly."
797 eerror "Failure to do so may cause unexpected problems."
798 eerror "Once you have satisfied these options, please try merging"
799 eerror "this package again."
800 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
801 die "Incorrect kernel configuration options"
802 elif [[ ${soft_errors_count} > 0 ]]; then
803 ewarn "Please check to make sure these options are set correctly."
804 ewarn "Failure to do so may cause unexpected problems."
805 else
806 eend 0
807 fi
808 export LINUX_CONFIG_EXISTS_DONE="${old_LINUX_CONFIG_EXISTS_DONE}"
809 }
810
811 check_zlibinflate() {
812 # if we haven't determined the version yet, we need to
813 require_configured_kernel
814 get_version
815
816 # although I restructured this code - I really really really dont support it!
817
818 # bug #27882 - zlib routines are only linked into the kernel
819 # if something compiled into the kernel calls them
820 #
821 # plus, for the cloop module, it appears that there's no way
822 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
823 # is on
824
825 local INFLATE
826 local DEFLATE
827
828 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
829
830 ebegin "checking ZLIB_INFLATE"
831 linux_chkconfig_builtin CONFIG_ZLIB_INFLATE
832 eend $?
833 [ "$?" != 0 ] && die
834
835 ebegin "checking ZLIB_DEFLATE"
836 linux_chkconfig_builtin CONFIG_ZLIB_DEFLATE
837 eend $?
838 [ "$?" != 0 ] && die
839
840 local LINENO_START
841 local LINENO_END
842 local SYMBOLS
843 local x
844
845 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
846 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
847 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
848 (( LINENO_END = $LINENO_END - 1 ))
849 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
850
851 # okay, now we have a list of symbols
852 # we need to check each one in turn, to see whether it is set or not
853 for x in $SYMBOLS ; do
854 if [ "${!x}" = "y" ]; then
855 # we have a winner!
856 einfo "${x} ensures zlib is linked into your kernel - excellent"
857 return 0
858 fi
859 done
860
861 eerror
862 eerror "This kernel module requires ZLIB library support."
863 eerror "You have enabled zlib support in your kernel, but haven't enabled"
864 eerror "enabled any option that will ensure that zlib is linked into your"
865 eerror "kernel."
866 eerror
867 eerror "Please ensure that you enable at least one of these options:"
868 eerror
869
870 for x in $SYMBOLS ; do
871 eerror " * $x"
872 done
873
874 eerror
875 eerror "Please remember to recompile and install your kernel, and reboot"
876 eerror "into your new kernel before attempting to load this kernel module."
877
878 die "Kernel doesn't include zlib support"
879 }
880
881 ################################
882 # Default pkg_setup
883 # Also used when inheriting linux-mod to force a get_version call
884 # @FUNCTION: linux-info_pkg_setup
885 # @DESCRIPTION:
886 # Force a get_version() call when inherited from linux-mod.eclass and then check if the kernel is configured
887 # to support the options specified in CONFIG_CHECK (if not null)
888 linux-info_pkg_setup() {
889 linux-info_get_any_version
890
891 if kernel_is 2 4; then
892 if [ "$( gcc-major-version )" -eq "4" ] ; then
893 echo
894 ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with"
895 ewarn "linux-2.4 (or modules building against a linux-2.4 kernel)!"
896 echo
897 ewarn "Either switch to another gcc-version (via gcc-config) or use a"
898 ewarn "newer kernel that supports gcc-4."
899 echo
900 ewarn "Also be aware that bugreports about gcc-4 not working"
901 ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
902 echo
903 epause 10
904 fi
905 fi
906
907 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
908 }

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